Ground: Hardcourt outdoor
| UTR Pro Yokohama | 2024/11/30 00:00 | Kai Kawano v Haruki Katsushima | 7-5,5-4 |
| UTR Pro Yokohama | 2024/11/29 01:00 | Haruki Katsushima v Kazuki Nishiwaki | 3-6,7-6,4-6 |
| UTR Pro Yokohama | 2024/11/27 01:57 | Kosuke Morita v Haruki Katsushima | 6-2,2-6,2-6 |
| UTR Pro Urayasu | 2024/10/19 00:00 | Kai Kawano v Haruki Katsushima | 6-0,6-1 |
| UTR Pro Urayasu | 2024/10/18 05:00 | Haruki Katsushima v Christopher Kosei Ono | 6-1,6-3 |
| UTR Pro Urayasu | 2024/10/17 01:00 | Haruki Katsushima v Yusuke Yoshikawa | 6-4,1-6,1-6 |
| UTR Pro Urayasu | 2024/10/16 00:00 | Takeshi Maruta v Haruki Katsushima | 3-6,4-6 |
| UTR Pro Kawaguchi | 2024/06/29 23:30 | Taiyo Kurata v Haruki Katsushima | 6-3,6-1 |
| UTR Pro Yokohama | 2025/01/27 01:30 | Arjun Mehrotra v Keisuke Ota | 6-4,7-6 |
| ITF M15 Yanagawa | 2024/10/28 04:00 | Keisuke Ota v Ke Hau Hung | 3-6,3-6 |
| ITF M15 Tanagura | 2024/10/20 00:30 | Keisuke Ota v Shu Muto | 4-6,0-6 |
| ITF M25 Sapporo | 2024/09/02 01:00 | Hiroki Sakagawa v Keisuke Ota | 6-0,6-0 |
| ITF M25 Sapporo | 2024/09/01 01:00 | Keisuke Ota v Jared Thompkins | 6-2,6-7,10-6 |
| UTR Pro Kawaguchi | 2024/06/24 02:44 | Brody Nejedly-Krall v Keisuke Ota | 6-2,2-6,7-5 |